Study of dynamics and structure in sodium silicate glasses. Molecular dynamics simulation.
Study of dynamics and structure in sodium silicate glasses. Molecular dynamics simulation.
复制标题
硅酸钠玻璃的动力学和结构研究。
DOI:
10.1016/j.jnoncrysol.2022.121398
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发表时间:
2022
影响因子:
3.5
通讯作者:
F. Noritake
中科院分区:
文献类型:
--
作者:
L. T. San;N. V. Yen;N. T. Thao;P. K. Hung;F. Noritake
We conduct molecular dynamics simulations to study dynamics and structure of sodium silicate glasses through Voronoi polyhedron and diffusion path consisting of Ox-polyhedrons connected via XY-lines. The result shows that Six-polyhedrons and the number of Ox-polyhedrons do not contain Na. Most of NBFx-polyhedrons contain 1, 2 or not Na, where BO, NBF is the O bonded with 2 and 1 or not Si, respectively. Average volume per polyhedron increases in order: Six-polyhedron → BOx-polyhedron → NBFx-polyhedron. Na atoms are concentrated in NBFx-polyhedrons and frequently move through them leading to very fast diffusivity of Na in comparison with Si and O. The simulation shows that the number of neighbors around NBFx-polyhedron is larger than that around BOx-polyhedron. Major Na atoms move over BN- and NN-lines connecting with NBFx-polyhedrons. Moreover, Na atoms displace through the preferential diffusion path comprising mainly of NBFx-polyhedrons. The correlation effect is significant for sodium diffusion.
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DOI:
--
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